Update to examples in the docs

Changelog for v2.2.1:

Commits
5f0a7b6 Add "context" to examples by @alexellis

Changes: v2.2.0...v2.2.1

Generated by Derek

Enable use of DisableStdioBuffer and allow for spaces in command

Changelog for v2.2.0:

• PR #17 Allow for spaces in command by @alexellis

Commits
15c40fa Enable use of DisableStdioBuffer by @alexellis
3c8da2f Allow for spaces in command by @alexellis

Changes: v2.0.0...v2.2.0

Generated by Derek

Allow for spaces in command

Prior to this change, Windows users who had a space in the
path to a command would encounter errors.

Tested with a unit test which failed before commenting out
code in exec.go to split out the command and arguments if
a space was within the command.

This is a breaking change and downstream users should make
sure they populate Command and Args separately.

https://github.com/alexellis/arkade/issues/117

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

V2 release

Changelog for v2.0.0:

• PR #16 Move to v2 module and enable stream redirection by @alexellis

Commits
fc7a3fd Update examples and usage by @alexellis
3d3061b Move to v2 module and enable stream redirection by @alexellis

Changes: v0.6.0...v2.0.0

Generated by Derek

Add context aware V2 API

Changelog for v0.6.0:

• PR #14 feat: Add context aware V2 API by @LucasRoesler

Commits
e7b8802 feat: Add context aware V2 API by @LucasRoesler
e93ae65 Update README.md by @alexellis
415046e Update go.mod by @alexellis
02af333 Update README.md by @alexellis
84c7a1f Update README.md by @alexellis

Changes: v0.5.0...v0.6.0

Generated by Derek

Release with v prefix for Go modules

Changelog for v0.5.0:

Commits
528c0bb Add go module by @alexellis

Generated by Derek

Support adding an input for stdin

Changelog for 0.4.1:

• PR #7 Support hooking in a reader for stdin by @alexellis

Commits
69a2cde Support hooking in a reader for stdin by @alexellis

Generated by Derek

Change priority of envs

Changelog for 0.4.0:

• PR #5 Update README.md by @gabeduke

Generated by Derek

Add StreamStdio option

Add option: StreamStdio

The StreamStdio option, when set to true, streams output to
STDIO. When set to false the user can only access the output
from the result.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Set exit-code when available

Sets exit-code when available. Error is only set if the exec failed.